// 移动获取经纬度
const handlerLB = new Cesium.ScreenSpaceEventHandler(viewer.canvas);
handlerLB.setInputAction(event => {
    const cartesian = viewer.scene.globe.pick(viewer.camera.getPickRay(event.endPosition), viewer.scene);
    if (!cartesian) return;
    const position = changeToLnglgt(cartesian);
    document.querySelector('.lng').innerHTML = position[0];
    document.querySelector('.lat').innerHTML = position[1];
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);